A. Natural Selection. This is because the weeds that are not resistant to it die out before they can reproduce, but the resistant ones grow to maturity and then reproduce, passing down the resistance gene. Over time, the resistance gene would become a normal thing in weeds, while the non-resistant gene would not exist anyone, since the gene could not be passed on.
The answer to your question is <span>B. Natural selection acted on the variation that was present in the population.
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The pair of structures that share the function of reabsorbing water into the body us the Hypothalamus and Pancreas.
Descriptive and inferential
